Novelty yarn and method of producing it



April 22, 1941.

A. A. FORSTER NOVELTY YARN AND METHOD OF PRODUCING IT Fired May :5, 19402 Sheets-Sheet 1 WITNESSES: @flflhm) INVENTOR;

m filfrzd fl Forster, 2! BY WW ATTORNEYS.

April 22, 1941- A. A. FORESTER 2,239,501

NOVELTY YARN AND METHOD OF PRODUCING IT Filed lay 3, 1940 2 Sheds-Sheet2 WITNESSES.- m gag/Tog.-

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Patented Apr. 22, 1941 NOVELTY YARN AND METHOD or raonucmo rr Alfred A.Forster, Drexel Hill, Pm, asllgnor to Clifton Yarn Mills, CliftonHeights, Pa a corporation of Pennsylvania Application May a, 1940,Serial No. 333,084

Clalms.

This invention relates to novelty yarns such as are used to create fancyeffects (as distinguished from definite design patterns) in fabricswoven or knitted from them, and also to methods of producing such yarns.

The chief aim of my invention is to make it possible to predeterminevarigated irregular striped effects and the like in fabrics moreespecially intended for use as dress materials or draping. Thisobjective I realize in practice, as hereinafter more fully disclosed,through provision of a compounded novelty yarn in which a plurality ofcover or sheathing threads are wrapped about spaced sections of acolored or otherwise contrasting core thread, with said sheathingthreads intertwisted in the intervening intervals.

Another aim of my invention is to make it possible to expeditiously andcheaply produce in quantity, novelty yarn characterized as above. Thisdesideratum I realize as also more fully set forth hereinafter, throughprovision of a simple method which can be practiced with the aid ofordinary types of twisting machines.

Other objects and attendant advantages will appear from the followingdetailed description of the attached drawings, wherein Fig. 1 shows afragment of my improved novelty yarn on an enlarged scale.

Fig. 2 is a similar view on a still larger scale showing a fragment ofthe core thread.

Fig. 3 shows the partially completed thread with one of the sheathing orcover threads wrapped about the core thread.

Fig. 4 is a view like Fig. 1 of the completed thread drawn to a scalecorresponding to that of Figs. 2 and 3.

Figs. 5 and 6 are diagrammatic views in vertical section of two twistingmachines suitably organized to carry out the method for commerciallyproducing the yarn.

As delineated in Fig. 1 and on a larger scale in Fig. 4, my improvednovelty yarn Y comprises two cover threads l0 and II which form a sheatharound section 12a of a base or core thread [2 separated by substantialskip intervals I3 which are where the aforesaid cover threads areintertwisted. For convenience of exemplification, the cover strand H](which, for convenience I term the effect thread), may be composed oftwo doubled ends of 50/ 1 bright white spun rayon, the second sheathingstrand H of a fine end of 50 Den. bright white rayon, and the corethread I2 of colored 100 Den. Union resist acetate thread. After itsformation in a manner presently described, the yarn may be dyed in anydesired color (other than that of the core), the dye selected being suchas will not affect the original color of the core sections IZa. Thus, inthe finished exemplified yarn the sheathing threads l0 and II willcontrast with the core sections l2a. It is to be understood, however,that threads of other sizesand materials may be employed, depending uponthe effect desired in the finished product. Thus, by way of furtherillustration, the sheathing threads Ill and Il, may be of altogetherdifferent materials such as real silk and cotton which will be afiectedto different extents by the dye employed and therefore be ofcorrespondly different shades of the same color in the finished yarn.Still other effects may be had by utilizing more than two sheathingyarns either of the same or different materials. As a further variation,the cover threads may be wrapped in opposite directions instead of inthe same direc,

tion as shown herein by way of illustration.

The yarn may be conveniently formed in two operations which arerespectively illustrated in Figs. 3 and 4. In the first operation, thesheathing thread It) is wrapped about the core thread l2 (of which afragment is shown in Fig. 2) after the manner illustrated in Fig. 3. Inthe second step, the other sheathing thread II is Wound about thepartially completed yarn Y of Fig. 3,

and tension is applied at the same time, so that the more fragile corethread I! is strained and broken at intervals after the manner shown inFig. 4.

The two steps or stages of the method just described can be convenientlycarried out with the aid of two twisting machines such asdiagrammatically illustrated in Figs. 5 and 6. The machine shown in Fig.5 has two sets of pinch rollers l5, l6 and II, III by which the corethread l2 and sheath thread Ill are drawn from separate sources ofsupply indicated at I!) and 20 respectively, and a revolving spool orspindle 2| which receives the partially completed thread Y. By means ofconnecting gearing conventionally indicated by the broken link circles22, 23 and 24, the rolls [1, I8 are driven at a somewhat faster ratethan the rolls l5 and It with the result that the core thread I2 ismaintained taut and the sheathing thread l0 wrapped about it by therotation of the spool 2| as the two threads pass the twisting point at25. In the second step or phase of the operation, the spool 2| of thepartially completed yarn Y is mounted, together twisting machine, likethat of Fig. has two sets of pinch rolls 21, 28 and 29, 88 which actrespectively upon the thread and the partially completed yarn Y. Bymeans oi the intermeshing spur gears conventionally indicated at ll, 32and 33, the rolls 29, 38 are driven at a somewhat faster rate than therolls 21, 28. As a result the partially completed thread Y is stretchedup to the breaking point of the core yarn 12 in the interval between thepinch rolls 21, 28 and 29, 38. The stretching takes place between theeye 34 and the pinch point 31 oi. the rolls 21, 28, while the repeatingrupture of the more fragile core thread l2 occurs between said eye 34and the pinch point 38 of the rolls 29, 38. The sheathing thread H meetswith the thread Y at the eye 84 and is doubled with the latter thread atthe pinch point 38 of the rolls 29 and 30, the doubling twist beinginduced by rotation of the collecting spool 85.

The above described apparatus is of course to be considered merely asrepresentative of other means by which my improved novelty yarn may beproduced in quantity for commercial purposes.

Having thus described my invention, I claim:

1. Novelty yarn in which a plurality of cover or sheathing threadssurround spaced sections of a core thread, and in which the cover orsheathing threads are intertwisted in the intervals intervening thecorethread sections.

2. Novelty yarn according to claim 1, in which the core and the cover orsheathing threads are 01' different colors.

3. Novelty yarn according to claim 1, in which the core and the cover orsheathing yarns are of different materials.

4. The method of producing novelty yarn with alternate thick and thinsegments which comprises wrapping a plurality of non-elastic cover orsheathing threads about a relatively fragile non-elastic core thread,and incldently straining the core thread to cause it to ruptureperiodically, and to cause elongation of the intervening twists of thesheathing threads.

5. The method 01' producing novelty yarn with alternate thick and thinsegments which comprises wrapping a non-elastic cover or sheathingthread about a relatively fragile non-elastic core v thread to form thepartially completed yarn, and

then wrapping another non-elastic sheathing or cover thread aboutthepartially completed yarn and incldently straining the core thread tocause it to rupture periodically, and to cause elongation of theintervening twists of the sheathing threads.

FOR/S'I'ER.

